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Nicola's advice

How to clean exterior walls easily and effectively

1 April 2025

How to clean exterior walls – Exterior walls are the calling card of your home or garden. But with rain, humidity, and the elements, keeping them clean and looking their best can be quite a challenge… or maybe not?

Cleaning terracotta and marble walls: here’s how to do it (without going crazy)

Whether it’s an elegant marble wall or a rustic yet charming terracotta wall, the key is regular care and the right products.
And this is where ALGANET + BROWN PAD and TIM come into play.

Cleaning with ALGANET + Brown Pad = A Winning Combination

ALGANET is a concentrated stain remover specifically designed to tackle mold, algae, and lichen on outdoor surfaces. And the real magic happens when it’s used in combination with the BROWN PAD – an effective yet gentle abrasive, perfect for working on fine materials without damaging them.
There’s one more ingredient you’ll need: elbow grease! A bit of effort is inevitable, but the results will be well worth it.

Cleaning Terracotta Walls

Terracotta is a porous, living material that easily absorbs dirt and moisture. But what really spoils its appearance are lichens—those stubborn little organisms that embed themselves deep into the pores, tough and hard to remove.
Here’s how to tackle them effectively:

  • Apply ALGANET directly onto the surface and let it sit for a few minutes.
  • Scrub vigorously with the BROWN PAD, focusing on areas affected by lichens.
  • Rinse thoroughly with clean water.

Let it dry completely.

external wall cleaning
external wall cleaning

Cleaning the marble wall

Marble requires a bit more delicacy, but with the right method, the result will be flawless. Mold and moisture stains are its main enemies.

  • Here too, the process starts with ALGANET: spray it evenly over the surface.
  • Use the BROWN PAD with gentle, circular motions.

Rinse thoroughly, making sure no product residue is left on the surface.

Pulizia del muretto in marmo

Long-Term Protection? Use TIM!

After cleaning, it’s essential to protect your walls to keep dirt from undoing all your hard work. That’s where TIM comes in—a water- and oil-repellent protective treatment that forms an invisible barrier against water, moisture, and the elements.

Application is super easy:

  • Let it dry: in just a few hours, the surface will be waterproof—yet still breathable.
  • Once the surface is dry, apply TIM with a brush or spray bottle.

With just a few simple steps, the right products, and a bit of effort, you can restore the authentic beauty of your exterior walls. These surfaces, often exposed to the elements, tend to accumulate dirt, moss, and lichens that dull their original appearance. Knowing how to properly clean exterior walls is essential to achieving effective, long-lasting results. Regular cleaning—done carefully and with the help of the right cleaners—removes these impurities and brings back the natural charm of your walls. The outcome is impressive: walls that can “breathe” again, enhancing any outdoor space and helping create a welcoming, well-kept environment. Investing time in maintaining these surfaces not only improves the aesthetics of your garden or terrace but also preserves the durability and integrity of the materials over time.

Correlated products
  • 19.82€

    ALGANET®

    Concentrated stain remover in powder specifically for the deep cleaning of external stone floors. It cleans and helps to remove algae, moss, and other encrustations of organic origin from surfaces.

  • 26.48€

    TIM®

    Protective product for the water-repellent and anti-stain treatment of absorbent stone materials. It does not create a film, is breathable and does not alter the appearance of the material.

  • 13.21€

    PAV05

    Protective finishing anti-dirt, anti-degradation wax resistant to atmospheric agents and trampling for cotto, stones and terrazo.

  • 4.36€

    BROWN BUFFER PAD MARBEC | Very Abrasive

    Sponge with strong abrasive properties, for strong descaling and de-waxing of stone materials.

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